I honestly do not understand why PS/2 ports are less common to find in motherboards these days. I have noticed that many gaming PCs cannot decide whether or not to include the Chad PS/2 port into their system. Some have one port, some have 2 ports for keyboard and mice, and some have the gall not to have any. In the world of gaming at least, PS/2 ports are superior because of their lower latency, instant recognition by the BIOS, and they just look aesthetic.

PS/2 ports have lower latency

I can justify this from first-hand experience. Yesterday I was playing an MS-DOS clone of Pac-Man called "Pako 2" on my old XP machine (using DOS-BOX) with a PS/2 keyboard and I couldn't help but notice how responsive Pac-Man was moving compared to my USB and laptop keyboards where the keys were delayed and Pac-Man's movements were awkward. It was much easier moving through tight areas to eat the dots and avoiding static hazards in the game.

They are instantly recognized in the BIOS

This time I lack first-hand experience but unless you have a laptop keyboard which I am typing from ironically since I use a Windows 11 laptop for practical uses and a Windows XP tower for more hobby purposes, you might find that your computer may not register your keyboard or mouse as quickly as a PS/2 keyboard. Notice how people will struggle to connect their keyboards (especially wireless ones) to the BIOS so it can register it. With PS/2, you don't face this issue since the BIOS instantly knows it's a keyboard or mouse. How convenient is that?

They simply look cool, and color-coding is a good thing

Most computers with PS/2 ports have this color scheme where purple is the keyboard and green is the mouse. USB on the other hand has a boring black or grey scheme. Imagine having your peripherals color coded with a color that is pleasant on the eyes. It makes working with computers a lot more exciting and easier since it provides a flamboyant aesthetic with a color code letting you know purple is keyboard and green is mouse.

Most of all, a dedicated port like PS/2 allows more space for USB ports.

So, there you have it, while PS/2 ports have slower transmit speed and have pins that break easily, they make up for their Chad-like qualities like lower latency, recognition by BIOS, and a cool color-coding aesthetic that frees up space.